Low-frequency speech cues and simulated electric-acoustic hearing
Low-frequency speech cues and simulated electric-acoustic hearing
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DOI：
10.1121/1.3068441
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发表时间：
2009-03-01
影响因子：
2.4
通讯作者：
Bacon, Sid P.
中科院分区：
文献类型：
--
作者：
Brown, Christopher A.;Bacon, Sid P.
在真实或模拟的电刺激(所谓的电声刺激或EAS)中添加低频声信息通常会导致可理解性的大幅提高，特别是在竞争背景下。这可以反映声学区域中基频(F0)信息的可用性。通过用频率调制的音调替换低频语音以跟踪语音的F0、用低频语音的包络跟踪F0或两者，来检查F0和语音的幅度包络(以及发声)对模拟EAS的贡献。一种模拟电听力的四通道声码器。在添加带有F0或信封提示的音调时，可以观察到比单独使用声码器有显著的好处，而且这两种提示的组合通常比单独使用提供的好处要多得多。与声码器相比，清晰度提高了24到57个百分点，并且不受背景说话者发出的带有这些提示的音调的影响。这些结果证实了目标语音的F0对于EAS(在仿真中)的重要性。它们表明，携带F0和幅度包络提示的音调可以提供显著的好处。这些结果支持了对东亚峰会的粗略描述，并反对种族隔离。
The addition of low-frequency acoustic information to real or simulated electric stimulation (so-called electric-acoustic stimulation or EAS) often results in large improvements in intelligibility, particularly in competing backgrounds. This may reflect the availability of fundamental frequency (F0) information in the acoustic region. The contributions of F0 and the amplitude envelope (as well as voicing) of speech to simulated EAS was examined by replacing the low-frequency speech with a tone that was modulated in frequency to track the F0 of the speech, in amplitude with the envelope of the low-frequency speech, or both. A four-channel vocoder simulated electric hearing. Significant benefit over vocoder alone was observed with the addition of a tone carrying F0 or envelope cues, and both cues combined typically provided significantly more benefit than either alone. The intelligibility improvement over vocoder was between 24 and 57 percentage points, and was unaffected by the presence of a tone carrying these cues from a background talker. These results confirm the importance of the F0 of target speech for EAS (in simulation). They indicate that significant benefit can be provided by a tone carrying F0 and amplitude envelope cues. The results support a glimpsing account of EAS and argue against segregation.